123520445 has 8 divisors (see below), whose sum is σ = 148773120. Its totient is φ = 98450640.

The previous prime is 123520421. The next prime is 123520451. The reversal of 123520445 is 544025321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123520445 - 2²⁶ = 56411581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44225 + ... + 46934.

It is an arithmetic number, because the mean of its divisors is an integer number (18596640).

Almost surely, 2^123520445 is an apocalyptic number.

It is an amenable number.

123520445 is a deficient number, since it is larger than the sum of its proper divisors (25252675).

123520445 is an equidigital number, since it uses as much as digits as its factorization.

123520445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91435.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 123520445 is about 11113.9752114174. The cubic root of 123520445 is about 498.0194250042.

Adding to 123520445 its reverse (544025321), we get a palindrome (667545766).

The spelling of 123520445 in words is "one hundred twenty-three million, five hundred twenty thousand, four hundred forty-five".